Her work is bound to be read by the bookmaker (6)

I believe the answer is:

author

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'bookmaker' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's a link between them I don't understand?

I don't understand the remainder of the clue.

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(Other definitions for author that I've seen before include "Writer of a book, article or document" , "Professional writer" , "Generator of written work" , "Writer of a book, say" , "Generator, source" .)

I've seen this clue in the Irish Times.

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